抽象工厂模式

抽象工厂模式在工厂模式的基础上又增加了一层抽象。将抽象工厂模式与工厂模式比较，很明显是添加了一个新的抽象层。抽象工厂是一个创建其他工厂的超级工厂。我们可以把它叫做“工厂的工厂”。

代码：

interface CPU {

    void process();

}

  

interface CPUFactory {

    CPU produceCPU();

}

  

class AMDFactory implements CPUFactory {

    public CPU produceCPU() {

        return new AMDCPU();

    }

}

  

class IntelFactory implements CPUFactory {

    public CPU produceCPU() {

        return new IntelCPU();

    }

}

  

class AMDCPU implements CPU {

    public void process() {

        System.out.println("AMD is processing...");

    }

}

  

class IntelCPU implements CPU {

    public void process() {

        System.out.println("Intel is processing...");

    }

}

  

class Computer {

    CPU cpu;

  

    public Computer(CPUFactory factory) {

        cpu = factory.produceCPU();

        cpu.process();

    }

}

  

public class Client {

    public static void main(String[] args) {

        new Computer(createSpecificFactory());

    }

  

    public static CPUFactory createSpecificFactory() {

        int sys = 0; // based on specific requirement

        if (sys == 0)

            return new AMDFactory();

        else

            return new IntelFactory();

    }

}